When I got pistons Wiseco made 2 styles for my banshee, the regular pro-lites and the "racers choice". The Pro-Lites are a one size fits all type of piston porting (windows in the sides of the piston, bottom of skirt notched to clear intake ports at TDC). The racers choice is designed to be cut for your specific porting job.
I haven't tried Vitos pistons personally but i don't like the idea of altering the shape/size of the piston to change power characteristics or compression. That's what porting is for on a 2 stroke. I decided to get the Wisecos and have them matched to my engine by my builder. I also had them triple ceramic coated which is working really well so far. It's a high-temp coat on the crown, an anti-friction coat on the skirt, and... some other type of coating on the inside of the skirt/crown area, lol.